CCNA 2 (v5.0.3 + v6.0) Chapter 8 Exam Answers 2018 – 100% Full

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Which DHCPv4 message will a client send to accept an IPv4 address that is offered by a DHCP server?unicast DHCPACK
broadcast DHCPACK
unicast DHCPREQUESTbroadcast DHCPREQUEST*

When a DHCP client receives DHCPOFFER messages, it will send a broadcast DHCPREQUEST message for two purposes. First, it indicates to the offering DHCP server that it would like to accept the offer and bind the IP address. Second, it notifies any other responding DHCP servers that their offers are declined.

A company uses DHCP servers to dynamically assign IPv4 addresses to employee workstations. The address lease duration is set as 5 days. An employee returns to the office after an absence of one week. When the employee boots the workstation, it sends a message to obtain an IP address. Which Layer 2 and Layer 3 destination addresses will the message contain?FF-FF-FF-FF-FF-FF and 255.255.255.255*
both MAC and IPv4 addresses of the DHCP server
MAC address of the DHCP server and 255.255.255.255
FF-FF-FF-FF-FF-FF and IPv4 address of the DHCP server

When the lease of a dynamically assigned IPv4 address has expired, a workstation will send a DHCPDISCOVER message to start the process of obtaining a valid IP address. Because the workstation does not know the addresses of DHCP servers, it sends the message via broadcast, with destination addresses of FF-FF-FF-FF-FF-FF and 255.255.255.255.

Dynamic allocation is the most commonly implemented allocation mechanism. It leases the IP parameters for a predefined period of time.

Which address does a DHCPv4 server target when sending a DHCPOFFER message to a client that makes an address request?client IP addressclient hardware address*
gateway IP address
broadcast MAC address

Which address does a DHCPv4 server target when sending a DHCPOFFER message to a client that makes an addres

As a DHCPv4 client lease is about to expire, what is the message that the client sends the DHCP server?DHCPDISCOVER
DHCPOFFERDHCPREQUEST*
DHCPACK

When a DHCP client lease is about to expire, the client sends a DHCPREQUEST message to the DHCPv4 server that originally provided the IPv4 address.​ This allows the client to request that the lease be extended.​

What is an advantage of configuring a Cisco router as a relay agent?It will allow DHCPDISCOVER messages to pass without alteration.
It can forward both broadcast and multicast messages on behalf of clients.It can provide relay services for multiple UDP services.*
It reduces the response time from a DHCP server.

An administrator issues the commands:
Router(config)# interface g0/1
Router(config-if)# ip address dhcp
What is the administrator trying to achieve?configuring the router to act as a DHCPv4 serverconfiguring the router to obtain IP parameters from a DHCPv4 server*
configuring the router to act as a relay agent
configuring the router to resolve IP address conflicts

The ip address dhcp command activates the DHCPv4 client on a given interface. By doing this, the router will obtain the IP parameters from a DHCPv4 server.

Under which two circumstances would a router usually be configured as a DHCPv4 client? (Choose two.)The router is intended to be used as a SOHO gateway.*
The administrator needs the router to act as a relay agent.
The router is meant to provide IP addresses to the hosts.This is an ISP requirement.*
The router has a fixed IP address.

SOHO routers are frequently required by the ISP to be configured as DHCPv4 clients in order to be connected to the provider.

A company uses the SLAAC method to configure IPv6 addresses for the employee workstations. Which address will a client use as its default gateway?​the all-routers multicast addressthe link-local address of the router interface that is attached to the network*
the unique local address of the router interface that is attached to the network
the global unicast address of the router interface that is attached to the network

When a PC is configured to use the SLAAC method for configuring IPv6 addresses, it will use the prefix and prefix-length information that is contained in the RA message, combined with a 64-bit interface ID (obtained by using the EUI-64 process or by using a random number that is generated by the client operating system), to form an IPv6 address. It uses the link-local address of the router interface that is attached to the LAN segment as its IPv6 default gateway address.

A network administrator configures a router to send RA messages with M flag as 0 and O flag as 1. Which statement describes the effect of this configuration when a PC tries to configure its IPv6 address?It should contact a DHCPv6 server for all the information that it needs.
It should use the information that is contained in the RA message exclusively.It should use the information that is contained in the RA message and contact a DHCPv6 server for additional information*
It should contact a DHCPv6 server for the prefix, the prefix-length information, and an interface ID that is both random and unique.

ICMPv6 RA messages contain two flags to indicate whether a workstation should use SLAAC, a DHCPv6 server, or a combination to configure its IPv6 address. These two flags are M flag and O flag. When both flags are 0 (by default), a client must only use the information in the RA message. When M flag is 0 and O flag is 1, a client should use the information in the RA message and look for the other configuration parameters (such as DNS server addresses) on DHCPv6 servers.

A company implements the stateless DHCPv6 method for configuring IPv6 addresses on employee workstations. After a workstation receives messages from multiple DHCPv6 servers to indicate their availability for DHCPv6 service, which message does it send to a server for configuration information?DHCPv6 SOLICIT
DHCPv6 REQUEST
DHCPv6 ADVERTISEDHCPv6 INFORMATION-REQUEST*

In stateless DHCPv6 configuration, a client configures its IPv6 address by using the prefix and prefix length in the RA message, combined with a self-generated interface ID. It then contacts a DHCPv6 server for additional configuration information via an INFORMATION-REQUEST message. The DHCPv6 SOLICIT message is used by a client to locate a DHCPv6 server. The DHCPv6 ADVERTISE message is used by DHCPv6 servers to indicate their availability for DHCPv6 service. The DHCPv6 REQUEST message is used by a client, in the stateful DHCPv6 configuration, to request ALL configuration information from a DHCPv6 server.

An administrator wants to configure hosts to automatically assign IPv6 addresses to themselves by the use of Router Advertisement messages, but also to obtain the DNS server address from a DHCPv6 server. Which address assignment method should be configured?SLAACstateless DHCPv6 *
stateful DHCPv6
RA and EUI-64

Stateless DHCPv6 allows clients to use ICMPv6 Router Advertisement (RA) messages to automatically assign IPv6 addresses to themselves, but then allows these clients to contact a DHCPv6 server to obtain additional information such as the domain name and address of DNS servers. SLAAC does not allow the client to obtain additional information through DHCPv6, and stateful DHCPv6 requires that the client receive its interface address directly from a DHCPv6 server. RA messages, when combined with an EUI-64 interface identifier, are used to automatically create an interface IPv6 address, and are part of both SLAAC and stateless DHCPv6.

How does an IPv6 client ensure that it has a unique address after it configures its IPv6 address using the SLAAC allocation method?It sends an ARP message with the IPv6 address as the destination IPv6 address.
It checks with the IPv6 address database that is hosted by the SLAAC server.
It contacts the DHCPv6 server via a special formed ICMPv6 message.It sends an ICMPv6 Neighbor Solicitation message with the IPv6 address as the target IPv6 address.*

SLAAC is a stateless allocation method and does not use a DHCP server to manage the IPv6 addresses. When a host generates an IPv6 address, it must verify that it is unique. The host will send an ICMPv6 Neighbor Solicitation message with its own IPv6 address as the target. As long as no other device responds with a Neighbor Advertisement message, then the address is unique.

What is used in the EUI-64 process to create an IPv6 interface ID on an IPv6 enabled interface?the MAC address of the IPv6 enabled interface*
a randomly generated 64-bit hexadecimal address
an IPv6 address that is provided by a DHCPv6 server
an IPv4 address that is configured on the interface

The EUI-64 process uses the MAC address of an interface to construct an interface ID (IID). Because the MAC address is only 48 bits in length, 16 additional bits (FF:FE) must be added to the MAC address to create the full 64-bit interface ID.

What two methods can be used to generate an interface ID by an IPv6 host that is using SLAAC? (Choose two.)EUI-64*random generation*
stateful DHCPv6
DAD
ARP

A host that is using SLAAC has two means to configure an interface ID: EUI-64 and random generation by the host operating system.

Refer to the exhibit. Based on the output that is shown, what kind of IPv6 addressing is being configured?

SLAAC
stateful DHCPv6stateless DHCPv6*
static link-local

Stateful DHCPv6 pools are configured with address prefixes for hosts via the address command, whereas stateless DHCPv6 pools typically only contain information such as DNS server addresses and the domain name. RA messages that are sent from routers that are configured as stateful DHCPv6 servers have the M flag set to 1 with the command ipv6 nd managed-config-flag, whereas stateless DHCPv6 servers are indicated by setting the O flag to 1 with the ipv6 nd other-config-flag command.

Refer to the exhibit. What should be done to allow PC-A to receive an IPv6 address from the DHCPv6 server?

Client DHCPv6 messages are sent to a multicast address with link-local scope, which means that the messages will not be forwarded by routers. Because the client and server are on different subnets on different interfaces, the message will not reach the server. The router can be configured to relay the DHCPv6 messages from the client to the server by configuring the ipv6 dhcp relay command on the interface that is connected to the client.

Refer to the exhibit. A network administrator is implementing stateful DHCPv6 operation for the company. However, the clients are not using the prefix and prefix-length information that is configured in the DHCP pool. The administrator issues a show ipv6 interface command. What could be the cause of the problem?

No virtual link-local address is configured
The Duplicate Address Detection feature is disabled
The router is configured for SLAAC DHCPv6 operationThe router is configured for stateless DHCPv6 operation*

The router is configured for stateless DHCPv6 operation, which is shown by the last two lines of the show command output. Hosts will configure their IPv6 addresses by using the prefix information that is provided by RA messages. They will also obtain additional configuration information from a DHCPv6 server. The “No virtual link-local address” option and the “Duplicate Address Detection” option are irrelevant to DHCP configuration. Option “SLAAC configuration” is incorrect because by definition SLAAC will use only the information that is provided by RA messages to configure IPv6 settings.

Refer to the exhibit. A network administrator is implementing the stateless DHCPv6 operation for the company. Clients are configuring IPv6 addresses as expected. However, the clients are not getting the DNS server address and the domain name information configured in the DHCP pool. What could be the cause of the problem?

The GigabitEthernet interface is not activatedThe router is configured for SLAAC operation*
The DNS server address is not on the same network as the clients are on
The clients cannot communicate with the DHCPv6 server, evidenced by the number of active clients being 0

The router is configured for SLAAC operation because there is no configuration command to change the RA M and O flag value. By default, both M and O flags are set to 0. In order to permint stateless DHCPv6 operation, the interface command ipv6 nd other-config-flag should be issued. The GigabitEthernet interface is in working condition because clients can get RA messages and configure their IPv6 addresses as expected. Also, the fact that R1 is the DHCPv6 server and clients are getting RA messages indicates that clients can communicate with the DHCP server. The number of active clients is 0 because the DHCPv6 server does not maintain the state of clients IPv6 addresses (it is not configured for stateful DHCPv6 operation). The DNS server address issue is not relevant to the problem.

Fill in the blank. Do not abbreviate
Type a command to exclude the first fifteen useable IP addresses from a DHCPv4 address pool of the network 10.0.15.0/24.
Router(config)# ip dhcpCorrect Answer: excluded-address 10.0.15.1 10.0.15.15*

The ip dhcp excluded-address command must be followed by the first and the last addresses to be excluded.

Order the steps of configuring a router as a DHCPv4 Server. (Not all options are used.)

Match the description to the corresponding DHCPv6 server type. (Not all options are used.)

Place the options in the following order:
[+] enabled in RA messages with the ipv6 nd other-config-flag command
[+] clients send only DHCPv6 INFORMATION-REQUEST messages to the server
[+] enabled on the client with the ipv6 address autoconfig command
[#] the M flag is set to 1 in RA messages
[#] uses the address command to create a pool of addresses for clients
[#] enabled on the client with the ipv6 address dhcp command[+] Order does not matter within this group.
[#] Order does not matter within this group.

A router is participating in an OSPFv2 domain. What will always happen if the dead interval expires before the router receives a hello packet from an adjacent DROTHER OSPF router?

OSPF will run a new DR/BDR election.

SPF will run and determine which neighbor router is “down”.

A new dead interval timer of 4 times the hello interval will start.

OSPF will remove that neighbor from the router link-state database.*

Which three statements describe the similarities between OSPFv2 and OSPFv3? (Choose three.)

They both are link-state protocols.*

They both use the global address as the source address when sending OSPF messages.

They both share the concept of multiple areas.*

They both support IPsec for authentication.

They both use the same DR/BDR election process.*

They both have unicast routing enabled by default.

Which OSPF component is identical in all routers in an OSPF area after convergence?

adjacency database

link-state database*

routing table

SPF tree

Which three statements describe features of the OSPF topology table? (Choose three.)

It is a link-state database that represents the network topology.*

Its contents are the result of running the SPF algorithm.

When converged, all routers in an area have identical topology tables.*

The topology table contains feasible successor routes.

The table can be viewed via the show ip ospf database command.*

After convergence, the table only contains the lowest cost route entries for all known networks.

What is used to create the OSPF neighbor table?

adjacency database*

link-state database

forwarding database

routing table

What is a function of OSPF hello packets?

to send specifically requested link-state records

to discover neighbors and build adjacencies between them*

to ensure database synchronization between routers

to request specific link-state records from neighbor routers

Which OPSF packet contains the different types of link-state advertisements?

hello

DBD

LSR

LSU*

LSAck

What are the two purposes of an OSPF router ID? (Choose two.)

to facilitate the establishment of network convergence

to uniquely identify the router within the OSPF domain*

to facilitate the transition of the OSPF neighbor state to Full

to facilitate router participation in the election of the designated router*

to enable the SPF algorithm to determine the lowest cost path to remote networks

What is the first criterion used by OPSF routers to elect a DR?

highest priority*

highest IP address

highest router ID

highest MAC address

Which wildcard mask would be used to advertise the 192.168.5.96/27 network as part of an OSPF configuration?

0.0.0.32

0.0.0.31*

255.255.255.224

255.255.255.223

What are two reasons that will prevent two routers from forming an OSPFv2 adjacency? (Choose two.)

a mismatched Cisco IOS version that is used

mismatched OSPF Hello or Dead timers*

mismatched subnet masks on the link interfaces*

use of private IP addresses on the link interfaces

one router connecting to a FastEthernet port on the switch and the other connecting to a GigabitEthernet port

Refer to the exhibit. A network administrator issued the command show ip ospf interface on the router R2. What conclusion can be drawn?

CCNA2 Chapter 8 v5.03 001

R2 is connecting to a point-to-point network.

R2 has not formed an adjacency with any other router.*

R2 is configured with the OSPF router-id command.

R2 is not configured with default Hello and Dead timer values.

What command would be used to determine if a routing protocol-initiated relationship had been made with an adjacent router?

ping

show ip protocols

show ip ospf neighbor*

show ip interface brief

Which OSPFv3 function works differently from OSPFv2?

metric calculation

hello mechanism

OSPF packet types

authentication*

election process

Which three addresses could be used as the destination address for OSPFv3 messages? (Choose three.)

FE80::1*

FF02::5*

FF02::6*

FF02::A

FF02::1:2

2001:db8:cafe::1

What does a Cisco router use automatically to create link-local addresses on serial interfaces when OSPFv3 is implemented?

the highest MAC address available on the router, the FE80::/10 prefix, and the EUI-48 process

the FE80::/10 prefix and the EUI-48 process

the MAC address of the serial interface, the FE80::/10 prefix, and the EUI-64 process

an Ethernet interface MAC address available on the router, the FE80::/10 prefix, and the EUI-64 process*

A network administrator enters the command ipv6 router ospf 64in global configuration mode. What is the result of this command?

The router will be assigned an autonomous system number of 64.

The router will be assigned a router ID of 64.

The reference bandwidth will be set to 64 Mb/s.

The OSPFv3 process will be assigned an ID of 64.*

Single area OSPFv3 has been enabled on a router via the ipv6 router ospf 20 command. Which command will enable this OSPFv3 process on an interface of that router?

ipv6 ospf 0 area 0

ipv6 ospf 20 area 20

ipv6 ospf 0 area 20

ipv6 ospf 20 area 0*

Which command will verify that a router that is running OSPFv3 has formed an adjacency with other routers in its OSPF area?

show running-configuration

show ipv6 ospf neighbor*

show ipv6 route ospf

show ipv6 interface brief

Fill in the blank. Do not use abbreviations.
To quickly verify OSPFv3 configuration information including the OSPF process ID, the router ID, and the interfaces enabled for OSPFv3, you need to issue the command show ipv6 protocols

Fill in the blank.The election of a DR and a BDR takes place on networks, such as Ethernet networks. multiaccess

Fill in the blank.
OSPF uses cost as a metric.

Match the information to the command that is used to obtain the information. (Not all options are used.)

Question

CCNA2 Chapter 8 v5.03 Question 001

Answer

CCNA2 Chapter 8 v5.03 Answer 001

Open the PT Activity. Perform the tasks in the activity instructions and then complete the task.
What message is displayed on www.ciscoville.com?

Finished!

Completion!*

Success!

Converged!

Which criterion is preferred by the router to choose a router ID?

the IP address of the highest configured loopback interface on the router

the IP address of the highest active interface on the router

the router-id rid command*

the IP address of the highest active OSPF-enabled interface

Which command should be used to check the OSPF process ID, the router ID, networks the router is advertising, the neighbors the router is receiving updates from, and the default administrative distance?

show ip protocols*

show ip ospf neighbor

show ip ospf

show ip ospf interface

A network administrator enters the command ipv6 router ospf 64 in global configuration mode. What is the result of this command?

The router will be assigned an autonomous system number of 64.

The router will be assigned a router ID of 64.

The reference bandwidth will be set to 64 Mb/s.

The OSPFv3 process will be assigned an ID of 64.*

When a network engineer is configuring OSPFv3 on a router, which command would the engineer issue immediately before configuring the router ID?

ipv6 ospf 10 area 0

ipv6 router ospf 10*

interface serial 0/0/1

clear ipv6 ospf process

Which command will provide information specific to OSPFv3 routes in the routing table?

show ip route ospf

show ip route

show ipv6 route

show ipv6 route ospf*

Fill in the blank.The election of a DR and a BDR takes place on multiaccess networks, such as Ethernet networks.

Match the description to the term. (Not all options are used.)Place the options in the following order:This is where the details of the neighboring routers can be found. -> adjacency databaseThis is the algorithm used by OSPF. -> Shortest Path FirstAll the routers are in the backbone area.-> Single-area OSPF – not scored – This is where you can find the topology table.-> link-state database – not scored –

What is the first criterion used by OSPF routers to elect a DR?Highest priority*
Highest IP address
Highest MAC address
Highest router ID

What are two reasons that will prevent routers from forming an OSPFv2 adjacency? (Choose two.)mismatched subnet masks on the link interfaces*
use of private IP addresses on the link interfaces
one router connecting to a FastEthernet port on the switch and the other connecting to a GigabitEthernet port
a mismatched Cisco IOS version that is usedmismatched OSPF Hello or Dead timers*

What command would be issued to determine if a routing protocol-initiated relationship has been made with an adjacent router?
show ip protocols
ping
show ip interface briefshow ip ospf neighbor*

Match the OSPF state with the order in which it occurs. (Not all options are used.)Place the options in the following order:second state -> Init state– not scored –seventh state -> Full statefifth state -> Exchange statefirst state -> Down statefourth state -> Exstart state– not scored –third state -> Two-way statesixth state -> Loading state